In their analysis, the Clean Coalition focused on two elements: the cost to produce electricity from solar facilities of various sizes and the cost to deliver that power (via the distribution or transmission system). As it turns out, fees to access the transmission system and transmission losses can offset any economies of scale from central station power generation.

The chart below illustrates the “sweet spot” balance between economies of scale and costs for transmission.

For context, in their latest examination of the levelized cost of energy generation, investment bank Lazard shows these prices are competitive with new coal power plants and substantially cheaper than new gas peaking power plants.

Of course, there’s more to the value of distributed renewable energy than just cost to generate and transmission access, whether it’s the economic multiplier from potential local ownership or the political value of community-based generation. But it’s good to know that even in this narrow view, distributed generation can compete with large-scale power generation.